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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Renesas ISL6329CRZ

Name: ISL6329CRZ
Brand: Renesas
SKU: ISL6329CRZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ISL6329CRZ

Manufacturer:: Renesas

Category:: Special Purpose Regulators

Package:: 60-VFQFN Exposed Pad

Datasheet:: ISL6329CRZ.pdf

Description:: IC REG CTRLR AMD SVI 2OUT 60QFN

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Product details

Overview

ISL6329CRZ from Renesas Electronics (formerly Intersil) is a dual-output, multiphase PWM controller IC designed for AMD SVI split-plane processors. It delivers precision core voltage regulation (±0.6% system accuracy over temperature) via up to six-phase synchronous buck conversion and independent single-phase Northbridge (VDDNB) regulation, with integrated MOSFET drivers, temperature-compensated DCR current sensing, and PSI_L-supported phase shedding - deployed in server and desktop motherboard VRMs.

For engineers reviewing the ISL6329CRZ datasheet, ISL6329CRZ pinout, ISL6329CRZ application, or ISL6329CRZ equivalent, key selection considerations include its 0°C to +70°C ambient rating, 60-lead QFN package, dual SVI/I²C interface support, droop-controlled load-line programming, and adaptive phase alignment for transient response in high-performance CPU power delivery.

Technical Context

The ISL6329CRZ implements a hybrid architecture: a 1–6-phase multiphase controller for AMD processor VDD (core) with fully differential continuous DCR current sensing, APA, and dual-edge modulation; and a dedicated single-phase controller for VDDNB (Northbridge) with independent feedback, OCP, and remote sensing. Both sections share SVI protocol handling and I²C programmability but operate with separate compensation networks and protection thresholds.

Its control logic integrates temperature-compensated current sensing (TCOMP1/TCOMP2 pins), programmable droop via DRPCTRL resistor selection, gate voltage optimization (GVOT) in PSI mode, and simultaneous digital soft-start. The device uses adaptive shoot-through protection, active pulse positioning modulation, and two-tiered overcurrent protection (instant/delayed) with channel-specific trip thresholds confirmed per datasheet Table 1 on page 10.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Temp Range	0°C to +70°C - defines industrial-grade ambient operating envelope for motherboard VRM deployment.
Core Voltage Accuracy	±0.6% over temperature - enables tight VID tracking for AMD SVI-compliant processors without external calibration.
Switching Frequency	0.15 MHz to 1.5 MHz - selectable via FS pin resistor; supports high-efficiency, low-ripple designs with optimized inductor sizing.
Phase Support	1–6 phases for Core, 1 phase for Northbridge - provides scalable output current capacity and dynamic phase shedding under PSI_L control.
Current Sensing	Fully differential, continuous DCR sensing with TCOMP1/TCOMP2 - enables accurate load-line programming and channel current balancing across all active phases.
Protection Features	Dual-tier OCP (instant/delayed), multi-level OVP, UVLO, and adaptive shoot-through prevention - ensures robust fault handling during load transients and startup.
I²C Address Options	8 programmable addresses via I2C_ADDR pin - allows multiple ISL6329CRZ devices on same bus for complex multi-rail systems.

Pinout & Package

ISL6329CRZ is housed in a 60-lead, 7 mm × 7 mm, 0.5 mm pitch QFN package with exposed thermal pad (PKG DWG # L60.7x7). Pin count, layout, and thermal characteristics are validated per datasheet pages 5–7 and thermal table on page 9.

Pin/Terminal	Circuit Role	Design Meaning
FB / FB_NB	Inverting input to core/Northbridge error amplifiers	Accepts remote-sense feedback for precision regulation; requires Kelvin connection to processor VDD_SENSE/VDDNB_SENSE.
VSEN / VSEN_NB	Non-inverting input to core/Northbridge remote-sense amps	Connects directly to processor sense pins; enables differential measurement rejecting PCB IR drop.
ISENn+, ISENn− (n=1–6)	Differential current sense inputs per phase	Supports DCR-based current monitoring for load-line droop, channel balancing, and OCP with temperature compensation.
UGATE1/2, LGATE1/2, UGATE_NB, LGATE_NB	Integrated gate drive outputs	Drive external N-channel MOSFETs; include adaptive dead-time control and shoot-through protection circuitry.
SVC / SVD	AMD Serial VID clock/data interface	Handles up to 3.4 MHz SVI signaling for dynamic VID updates and processor communication.
EN	System enable input	Threshold-sensitive (~0.85 V) enable pin; also monitors external driver bias supply via resistor divider.

Key Features

Feature	Design Value
Adaptive Phase Alignment (APA)	Programmable threshold via APA pin RC network - reduces phase-to-phase timing skew to improve transient response and reduce output ripple.
Temperature-Compensated DCR Sensing	TCOMP1/TCOMP2 pins calibrate inductor DCR drift - maintains accurate current reporting and load-line regulation across 0°C to +70°C ambient.
PSI_L-Driven Power Savings Mode	Reduces active phases to 1 or 2 and enables gate voltage optimization (GVOT = 11.1 V) - cuts driver losses at light load without sacrificing regulation.
Dual-Edge Modulation	Enables faster initial response to high di/dt load steps - critical for modern CPU burst-mode operation and VRM stability.
Simultaneous Digital Soft-Start	Coordinates ramp-up of both core and Northbridge outputs - prevents sequencing conflicts and ensures safe power-up of split-plane processors.

Applications

Server CPU VRM	Desktop AMD Platform Power
Use Scenario: High-current, multi-phase voltage regulation for AMD Opteron or Phenom-class processors in 1U/2U rack servers. IC Role / Device Role / Timing Role: Dual-output PWM controller managing core (VDD) and Northbridge (VDDNB) rails with SVI interface, phase shedding, and droop control. Use Value: Enables stable 6-phase core rail operation with ±0.6% accuracy and fast transient recovery (<100 ns non-overlap timing) under dynamic workloads.	Use Scenario: Compact, cost-optimized motherboard power solution for consumer AMD AM3/AM3+ platforms. IC Role / Device Role / Timing Role: Monolithic dual-controller delivering both processor core and chipset voltage rails using integrated drivers and shared SVI bus. Use Value: Reduces BOM count by integrating two controllers and six gate drivers - eliminates need for discrete phase controllers and external driver ICs.
High-Performance Workstation	Embedded AMD-Based Systems
Use Scenario: Multi-GPU rendering workstation requiring precise, low-noise CPU voltage with rapid load-step response. IC Role / Device Role / Timing Role: Core regulator with APA and dual-edge modulation; Northbridge regulator with independent OVP/OCP and remote sensing. Use Value: Achieves <1% total output deviation during 50 A/µs load steps via continuous DCR sensing and adaptive loop compensation.	Use Scenario: Industrial embedded system using AMD G-Series APUs where space, thermal margin, and long-term supply continuity are critical. IC Role / Device Role / Timing Role: Single-chip dual-rail controller supporting SVI protocol, I²C configuration, and RoHS-compliant 60-lead QFN packaging. Use Value: Simplifies compliance and lifecycle management with Pb-free reflow profile, MSL3 rating, and Renesas long-term product support.

Server CPU VRM

Desktop AMD Platform Power

Use Scenario: High-current, multi-phase voltage regulation for AMD Opteron or Phenom-class processors in 1U/2U rack servers.

IC Role / Device Role / Timing Role: Dual-output PWM controller managing core (VDD) and Northbridge (VDDNB) rails with SVI interface, phase shedding, and droop control.

Use Value: Enables stable 6-phase core rail operation with ±0.6% accuracy and fast transient recovery (<100 ns non-overlap timing) under dynamic workloads.

Use Scenario: Compact, cost-optimized motherboard power solution for consumer AMD AM3/AM3+ platforms.

IC Role / Device Role / Timing Role: Monolithic dual-controller delivering both processor core and chipset voltage rails using integrated drivers and shared SVI bus.

Use Value: Reduces BOM count by integrating two controllers and six gate drivers - eliminates need for discrete phase controllers and external driver ICs.

High-Performance Workstation

Embedded AMD-Based Systems

Use Scenario: Multi-GPU rendering workstation requiring precise, low-noise CPU voltage with rapid load-step response.

IC Role / Device Role / Timing Role: Core regulator with APA and dual-edge modulation; Northbridge regulator with independent OVP/OCP and remote sensing.

Use Value: Achieves <1% total output deviation during 50 A/µs load steps via continuous DCR sensing and adaptive loop compensation.

Use Scenario: Industrial embedded system using AMD G-Series APUs where space, thermal margin, and long-term supply continuity are critical.

IC Role / Device Role / Timing Role: Single-chip dual-rail controller supporting SVI protocol, I²C configuration, and RoHS-compliant 60-lead QFN packaging.

Use Value: Simplifies compliance and lifecycle management with Pb-free reflow profile, MSL3 rating, and Renesas long-term product support.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output multiphase controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISL6329IRZ	Wider temperature range (−40°C to +85°C); identical pinout, functionality, and electrical specs except ambient rating.	Required for extended-temperature industrial or telecom deployments; not suitable for cost-sensitive commercial desktops where 0°C–70°C suffices.	Select ISL6329IRZ only when ambient exceeds +70°C or storage below 0°C is required.
RT8803AZSP	Single-core 3–6-phase controller (no integrated Northbridge regulator); lacks SVI interface; uses SMBus instead of I²C.	Applicable only when Northbridge rail is supplied separately or omitted; requires redesign of SVI signal routing and firmware interface.	Use RT8803AZSP only in new designs targeting lower BOM cost and simpler topology - not as drop-in replacement.

Compared with ISL6329IRZ, the ISL6329CRZ trades extended temperature capability for lower unit cost and qualification scope; compared with RT8803AZSP, it retains full AMD SVI compatibility and dual-rail integration but at higher complexity and price - making ISL6329CRZ optimal for mainstream AMD desktop/server VRMs needing guaranteed 0°C–70°C operation.

Availability

ISL6329CRZ is available at Aetrix Electronics and suitable for server motherboard VRMs, desktop AMD platform power designs, and high-performance workstation power delivery requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.

Supply support for ISL6329CRZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader formed from the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog, power management, and timing solutions.

The ISL6329CRZ belongs to Renesas' legacy Intersil power management portfolio, specifically engineered for AMD processor power delivery - emphasizing SVI protocol fidelity, multiphase scalability, and thermal robustness in dense motherboard layouts.

FAQ

What is the maximum ambient temperature rating for the ISL6329CRZ?

The ISL6329CRZ is rated for operation from 0°C to +70°C ambient temperature, as specified in the official ordering information table on page 7 of FN7800 Rev 0.00. This industrial-grade rating aligns with standard commercial desktop and server motherboard thermal envelopes and is distinct from the −40°C to +85°C rating of the ISL6329IRZ variant.

Does the ISL6329CRZ support AMD Serial VID (SVI) interface?

Yes, the ISL6329CRZ natively supports AMD Serial VID (SVI) via dedicated SVC and SVD pins, handling clock rates up to 3.4 MHz as confirmed in the datasheet Features section and page 15 operational description. It decodes dynamic VID commands from AMD processors to regulate core voltage and supports Pre-PWROK METAL VID mode for initialization.

How many phases can the ISL6329CRZ control for the processor core voltage?

The ISL6329CRZ supports 1 to 6 phases for the processor core (VDD) rail using its multiphase controller section. Phases 1–2 use internal drivers; phases 3–6 require external PWM drivers connected to PWM3–PWM6 outputs. Channel enable/disable is controlled via ISEN− pin biasing per datasheet page 7 functional description.

What package type and pin count does the ISL6329CRZ use?

The ISL6329CRZ uses a 60-lead QFN package measuring 7 mm × 7 mm with 0.5 mm pitch and an exposed thermal pad (PKG DWG # L60.7x7), as documented in the Ordering Information table on page 7 of FN7800 Rev 0.00. This package is RoHS-compliant and qualified for Pb-free reflow per J-STD-020 MSL3.

Does the ISL6329CRZ integrate gate drivers for both core and Northbridge outputs?

Yes, the ISL6329CRZ integrates dual gate drivers for the core multiphase section (UGATE1/LGATE1, UGATE2/LGATE2) and a dedicated single-phase driver set for Northbridge (UGATE_NB/LGATE_NB), as shown in the Integrated Driver Block Diagram (page 2) and confirmed in the Features list. All drivers include adaptive shoot-through protection and bootstrap circuitry.

ISL6329CRZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 60-VFQFN Exposed Pad

Packaging:: Tube

Product Status:: Obsolete

Applications:: Controller, AMD SVI

Voltage - Input:: 5V ~ 12V

Number of Outputs:: 2

Voltage - Output:: 0.0125V ~ 1.55V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 60-QFN (7x7)

ISL6329CRZ FAQ

1.How can I place an order for ISL6329CRZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ISL6329CRZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ISL6329CRZ reliable?

The price and inventory of ISL6329CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6329CRZ is usually 5 days.

3.What payment methods are accepted for ISL6329CRZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6329CRZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ISL6329CRZ?

ISL6329CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ISL6329CRZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ISL6329CRZ?

For technical support, including ISL6329CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6329CRZ requirements.

6.How does Aetrix verify that ISL6329CRZ is sourced from the original manufacturer or authorized distributors?

All ISL6329CRZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL6329CRZ meets industry standards.

7.What is the process for return or replacement of ISL6329CRZ?

All ISL6329CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6329CRZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ISL6329CRZ part is unused and in its original packaging.

Return procedure for ISL6329CRZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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